Pakkun is a magical sprite permanently bound to the form of a plush teddy bear, concealing his true identity as an interdimensional guardian. He initially appears as an ordinary stuffed toy gifted to Paul on his birthday, featuring crossed eyes that create a perpetually dazed expression despite his significant mystical duties.

As the designated keeper of the portal between Earth and the Land of Wonders, Pakkun governs access to this alternate dimension. His core abilities include manipulating time, creating dimensional passages, and wielding a magic hammer to alter object sizes or unlock pathways. These powers enable travel between worlds but operate under strict time constraints that sometimes complicate rescue efforts.

After Nina's kidnapping by the demonic ruler Belt Satan, Pakkun becomes Paul's essential companion and guide throughout the rescue mission, maintaining unwavering loyalty despite recurring challenges. He provides tactical support during monster confrontations, often utilizing Paul's enlarged yo-yo as a weapon. His role extends beyond combat, contributing humor and emotional stability to the group dynamic.

Pakkun collaborates closely with Doppe, Nina's talking Saint Bernard dog who uses his ears for flight. Their partnership aids navigation through the Land of Wonders' unpredictable environments, which include living toys and abstract realms. Pakkun's entire narrative arc exists entirely within the original 50-episode series.